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Transfer Ownersh...439407982023-06-15 13:56:54366 days ago1686837414IN
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0 MATIC0.01989098415.49482772
Deploy Beacon439406632023-06-15 13:52:08366 days ago1686837128IN
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0 MATIC0.2493231640.82304842
0x60806040439406512023-06-15 13:51:42366 days ago1686837102IN
 Create: CollectionFactory
0 MATIC1.90910175618.5092418

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Contract Source Code Verified (Exact Match)

Contract Name:
CollectionFactory

Compiler Version
v0.8.15+commit.e14f2714

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 16 : CollectionFactory.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

import {Ownable2Step} from "@openzeppelin/contracts-0.8.15/access/Ownable2Step.sol";
import {UpgradeableBeacon} from "@openzeppelin/contracts-0.8.15/proxy/beacon/UpgradeableBeacon.sol";
import {EnumerableSet} from "@openzeppelin/contracts-0.8.15/utils/structs/EnumerableSet.sol";
import {Address} from "@openzeppelin/contracts-0.8.15/utils/Address.sol";
import {CollectionProxy} from "./CollectionProxy.sol";
import {IERC5313} from "../common/IERC5313.sol";

/**
 * @title CollectionFactory
 * @author qed.team x The Sandbox
 * @notice Collection Factory used to manage (mostly) avatar collections
 *
 * - it's purpose is to allow for easy deployment of new collections and easy upgrade of existing ones
 * - factory can launch (or be added to) a beacon {UpgradeableBeacon} to which collection may point
 * - each collection is represented by a {CollectionProxy} that points to a beacon
 * - collections (proxies) can have the beacon they are pointing to changed
 */
contract CollectionFactory is Ownable2Step {
    using EnumerableSet for EnumerableSet.AddressSet;
    using EnumerableSet for EnumerableSet.Bytes32Set;

    /*//////////////////////////////////////////////////////////////
                           Global state variables
    //////////////////////////////////////////////////////////////*/

    /// @notice list of tracked beacon addresses
    EnumerableSet.Bytes32Set internal aliases;

    /// @notice mapping alias to beacon address
    mapping(bytes32 => address) public aliasToBeacon;

    /// @notice beacon/alias count; used as a helper for off-chain operations mostly
    uint256 public beaconCount;

    /// @notice set of deployed collection addresses (Proxies)
    EnumerableSet.AddressSet internal collections;

    /// @notice collection count; used as a helper for off-chain operations mostly
    uint256 public collectionCount;

    /*//////////////////////////////////////////////////////////////
                                Events
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Event emitted when a beacon was marked as followed by the factory
     * @dev emitted when deployBeacon or addBeacon is called
     * @param beaconAlias the alias (bytes32) used for this beacon
     * @param beaconAddress the marked beacon address
     */
    event BeaconAdded(bytes32 indexed beaconAlias, address indexed beaconAddress);

    /**
     * @notice Event emitted when a beacon has its implementation updated
     * @dev emitted when updateBeaconImplementation is called
     * @param oldImplementation the old beacon implementation
     * @param newImplementation the new beacon implementation
     * @param beaconAlias the alias for the used beacon
     * @param beaconAddress the new beacon address that is used
     */
    event BeaconUpdated(
        address indexed oldImplementation,
        address indexed newImplementation,
        bytes32 indexed beaconAlias,
        address beaconAddress
    );

    /**
     * @notice Event emitted when a beacon was removed from tracking
     * @dev emitted when transferBeacon is called
     * @param beaconAlias the alias of the removed beacon
     * @param beaconAddress the address of the removed beacon
     * @param newBeaconOwner the address of the new owner of the beacon
     */
    event BeaconRemoved(bytes32 indexed beaconAlias, address indexed beaconAddress, address indexed newBeaconOwner);

    /**
     * @notice Event emitted when the owner of this beacon was changed
     * @dev emitted when transferBeacon is called
     * @param oldOwner the previous owner of the beacon
     * @param newOwner the current owner of the beacon
     */
    event BeaconOwnershipChanged(address indexed oldOwner, address indexed newOwner);

    /**
     * @notice Event emitted when a collection (proxy) was deployed
     * @dev emitted when deployCollection is called
     * @param beaconAddress the used beacon address for the collection
     * @param collectionProxy the new collection proxy address
     */
    event CollectionAdded(address indexed beaconAddress, address indexed collectionProxy);

    /**
     * @notice Event emitted when a collection (proxy) was updated (had it's implementation change)
     * @dev emitted when updateCollection is called
     * @param proxyAddress the proxy address whose beacon has changed
     * @param beaconAlias the alias for the used beacon
     * @param beaconAddress the new beacon address that is used
     */
    event CollectionUpdated(address indexed proxyAddress, bytes32 indexed beaconAlias, address indexed beaconAddress);

    /**
     * @notice Event emitted when a collection was removed from tracking from a beacon
     * @dev emitted when transferCollections is called
     * @param beaconAddress the address of the beacon to which this collection points to
     * @param collectionProxy the address of the removed collection
     */
    event CollectionRemoved(address indexed beaconAddress, address indexed collectionProxy);

    /**
     * @notice Event emitted when the admin of this proxy was changed
     * @dev emitted when transferCollections is called
     * @param oldAdmin the previous admin of the collection proxy
     * @param newAdmin the current admin of the collection proxy
     */
    event CollectionProxyAdminChanged(address indexed oldAdmin, address indexed newAdmin);

    /*//////////////////////////////////////////////////////////////
                                Modifiers
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Modifier used to check if a beacon is actually tracked by factory
     * @param beaconAlias the beacon address to check
     */
    modifier beaconIsAvailable(bytes32 beaconAlias) {
        require(aliasToBeacon[beaconAlias] != address(0), "CollectionFactory: beacon is not tracked");
        _;
    }

    /**
     * @notice Modifier used to check if a collection is actually tracked by factory
     * @param collection the collection address to check
     */
    modifier collectionExists(address collection) {
        require(collections.contains(collection), "CollectionFactory: collection is not tracked");
        _;
    }

    /**
     * @notice Modifier used to check if caller is the owner of the specific collection or the owner of the factory
     * @param collection the targeted collection address
     */
    modifier onlyOwners(address collection) {
        require(
            IERC5313(collection).owner() == msg.sender || owner() == msg.sender,
            "CollectionFactory: caller is not collection or factory owner"
        );
        _;
    }

    /*//////////////////////////////////////////////////////////////
                    External and public functions
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice deploys a beacon with the provided implementation address and tracks it
     * @dev {UpgradeableBeacon} checks that implementation is actually a contract
     * @custom:event {BeaconAdded}
     * @param implementation the beacon address to be added/tracked
     * @param beaconAlias the beacon alias to be attributed to the newly deployed beacon
     * @return beacon the newly added beacon address that was launched
     */
    function deployBeacon(address implementation, bytes32 beaconAlias) external onlyOwner returns (address beacon) {
        require(beaconAlias != 0, "CollectionFactory: beacon alias cannot be empty");
        require(aliasToBeacon[beaconAlias] == address(0), "CollectionFactory: beacon alias already used");

        beacon = address(new UpgradeableBeacon(implementation));
        _saveBeacon(beacon, beaconAlias);
    }

    /**
     * @notice adds, an already deployed beacon, to be tracked/used by the factory;
     *         Beacon ownership must be transferred to this contract beforehand
     * @dev checks that implementation is actually a contract and not already added;
     *      will revert if beacon owner was not transferred to the factory beforehand
     * @custom:event {BeaconAdded}
     * @custom:event {CollectionAdded} for each collection
     * @param beacon the beacon address to be added/tracked
     * @param beaconAlias the beacon address to be added/tracked
     */
    function addBeacon(address beacon, bytes32 beaconAlias) external onlyOwner {
        require(beaconAlias != 0, "CollectionFactory: beacon alias cannot be empty");
        require(aliasToBeacon[beaconAlias] == address(0), "CollectionFactory: beacon alias already used");
        require(Address.isContract(beacon), "CollectionFactory: beacon is not a contract");
        require(_isFactoryBeaconOwner(beacon), "CollectionFactory: ownership must be given to factory");

        _saveBeacon(beacon, beaconAlias);
    }

    /**
     * @notice Changes the implementation pointed by the indicated beacon
     * @dev {UpgradeableBeacon.upgradeTo} checks that implementation is actually a contract
     * @custom:event {BeaconUpdated}
     * @param beaconAlias alias for the beacon for which to change the implementation
     * @param implementation the new implementation for the indicated beacon
     */
    function updateBeaconImplementation(bytes32 beaconAlias, address implementation)
        external
        onlyOwner
        beaconIsAvailable(beaconAlias)
    {
        UpgradeableBeacon beacon = UpgradeableBeacon(aliasToBeacon[beaconAlias]);
        address oldImplementation = beacon.implementation();
        beacon.upgradeTo(implementation);
        emit BeaconUpdated(oldImplementation, implementation, beaconAlias, address(beacon));
    }

    /**
     * @notice Transfers a beacon from the factory. Sets the owner to the provided one.
     * @custom:event {BeaconOwnershipChanged}
     * @custom:event {BeaconRemoved}
     * @param beaconAlias alias for the beacon to remove
     * @param newBeaconOwner the new owner of the beacon. It will be changed to this before removal
     */
    function transferBeacon(bytes32 beaconAlias, address newBeaconOwner)
        external
        onlyOwner
        beaconIsAvailable(beaconAlias)
    {
        // "owner not zero address" check is done in UpgradeableBeacon::Ownable::transferOwnership
        address beacon = aliasToBeacon[beaconAlias];
        delete aliasToBeacon[beaconAlias];
        beaconCount -= 1;

        bool success = aliases.remove(beaconAlias);
        require(success, "CollectionFactory: failed to remove alias");

        UpgradeableBeacon(beacon).transferOwnership(address(newBeaconOwner));
        emit BeaconOwnershipChanged(address(this), newBeaconOwner);

        emit BeaconRemoved(beaconAlias, beacon, newBeaconOwner);
    }

    /**
     * @notice deploys a collection, making it point to the indicated beacon address
               and calls any initialization function if initializationArgs is provided
     * @dev checks that implementation is actually a contract and not already added
     * @custom:event CollectionAdded
     * @param beaconAlias alias for the beacon from which the collection will get its implementation
     * @param initializationArgs (encodeWithSignature) initialization function with arguments
     *                           to be called on newly deployed collection. If not provided,
     *                           will not call any function
     * @return collection the newly created collection address
     */
    function deployCollection(bytes32 beaconAlias, bytes calldata initializationArgs)
        public
        onlyOwner
        beaconIsAvailable(beaconAlias)
        returns (address collection)
    {
        address beacon = aliasToBeacon[beaconAlias];
        CollectionProxy collectionProxy = new CollectionProxy(beacon, initializationArgs);
        collection = address(collectionProxy);

        collections.add(collection);
        collectionCount += 1;

        emit CollectionAdded(beacon, collection);
    }

    /**
     * @notice adds collections to be tracked by the factory
     *         Collection ownership must be transferred to this contract beforehand
     * @dev Reverts if:
     *      - no collections no were given, if the {collections_} list is empty
     *      - any of the give collections is 0 address
     *      - the collection owner is not the factory
     *      - failed to add the collection (duplicate present)
     *      - the owner of the beacon pointed by the proxy is not the factory
     * @custom:event {CollectionAdded} for each collection
     * @param _collections the collections to be added to the factory
     */
    function addCollections(address[] memory _collections) external onlyOwner {
        require(_collections.length != 0, "CollectionFactory: empty collection list");

        uint256 collectionsLength = _collections.length;
        collectionCount += collectionsLength;
        bool success;
        address beacon;

        for (uint256 index; index < collectionsLength; ) {
            address collectionAddress = _collections[index];
            require(collectionAddress != address(0), "CollectionFactory: collection is zero address");

            CollectionProxy collection = CollectionProxy(payable(collectionAddress));
            require(collection.proxyAdmin() == address(this), "CollectionFactory: owner of collection must be factory");

            success = collections.add(address(collection));
            require(success, "CollectionFactory: failed to add collection");

            beacon = collection.beacon();
            require(_isFactoryBeaconOwner(beacon), "CollectionFactory: beacon ownership must be given to factory");

            emit CollectionAdded(collection.beacon(), address(collection));

            unchecked {++index;}
        }
    }

    /**
     * @notice change what beacon the collection is pointing to. If updateArgs are provided,
     *         will also call the specified function
     * @custom:event CollectionAdded
     * @param collection the collection for which the beacon to be changed
     * @param beaconAlias alias for the beacon to be used by the collection
     * @param updateArgs (encodeWithSignature) update function with arguments to be called on
     *                   the newly update collection. If not provided, will not call any function
     */
    function updateCollection(
        address collection,
        bytes32 beaconAlias,
        bytes memory updateArgs
    ) external beaconIsAvailable(beaconAlias) collectionExists(collection) onlyOwners(collection) {
        address beacon = aliasToBeacon[beaconAlias];
        CollectionProxy(payable(collection)).changeBeacon(beacon, updateArgs);

        emit CollectionUpdated(collection, beaconAlias, beacon);
    }

    /**
     * @notice Transfers a list of collections from the factory. Sets the owner to the provided one.
     * @dev will revert it a collection from the list is not tracked by the factory or if new owner is 0 address
     * @custom:event {CollectionRemoved} for each removed collection
     * @custom:event {CollectionProxyAdminChanged}
     * @param _collections list of collections to transfer
     * @param newCollectionOwner the new owner of the beacon. It will be changed to this before transfer
     */
    function transferCollections(address[] calldata _collections, address newCollectionOwner) external onlyOwner {
        // "owner not zero address" check done in CollectionProxy::changeCollectionProxyAdmin::_changeAdmin::_setAdmin
        bool success;
        uint256 collectionsLength = _collections.length;

        for (uint256 index; index < collectionsLength; ) {
            CollectionProxy collection = CollectionProxy(payable(_collections[index]));

            success = collections.remove(address(collection));
            require(success, "CollectionFactory: failed to remove collection");
            emit CollectionRemoved(collection.beacon(), address(collection));

            collection.changeCollectionProxyAdmin(newCollectionOwner);
            emit CollectionProxyAdminChanged(address(this), newCollectionOwner);

            unchecked {++index;}
        }

        collectionCount -= collectionsLength;
    }

    /*//////////////////////////////////////////////////////////////
                    Public/external helper functions
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Helper function that retrieves all beacons tracked by the factory
     * @return list of beacons managed by the factory
     */
    function getBeacons() external view returns (address[] memory) {
        uint256 beaconCount_ = beaconCount;
        address[] memory beacons_ = new address[](beaconCount_);
        for (uint256 index = 0; index < beaconCount_; index++) {
            bytes32 beaconAlias = aliases.at(index);
            beacons_[index] = aliasToBeacon[beaconAlias];
        }
        return beacons_;
    }

    /**
     * @notice Helper function that retrieves all aliases tracked by the factory
     * @return list of aliases managed by the factory
     */
    function getBeaconAliases() external view returns (bytes32[] memory) {
        return aliases.values();
    }

    /**
     * @notice Helper function that retrieves the beacon alias from the specific index
     * @param index index at which to get the alias from
     * @return alias at that specific index
     */
    function getBeaconAlias(uint256 index) external view returns (bytes32) {
        return aliases.at(index);
    }

    /**
     * @notice Helper function that retrieves all collections tracked by the factory
     * @return list of collections managed by the factory
     */
    function getCollections() external view returns (address[] memory) {
        return collections.values();
    }

    /**
     * @notice Helper function that retrieves the collection at a specific index
     * @param index index at which to get the collection from
     * @return collection address from specific index
     */
    function getCollection(uint256 index) external view returns (address) {
        return collections.at(index);
    }

    /**
     * @notice Helper function that retrieves the beacon pointed to by the collection proxy
     * @param collection the collection for which to get the pointed beacon
     * @return the beacon address pointed by the collection
     */
    function beaconOf(address collection) external view collectionExists(collection) returns (address) {
        return CollectionProxy(payable(collection)).beacon();
    }

    /*//////////////////////////////////////////////////////////////
                    Other contract logic functions
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice function renounces ownership of contract. Currently it is disable,
     *         as to not risk losing the ability to manage/deploy collections
     * @dev reverts on call
     */
    function renounceOwnership() public virtual override onlyOwner {
        revert("CollectionFactory: renounce ownership is not available");
    }

    /*//////////////////////////////////////////////////////////////
                    Internal and private functions
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Saves the beacon address into internal tracking
     * @dev beacon address sanity checks must be done before calling this function
     * @custom:event {BeaconAdded}
     * @param beacon the beacon address to me marked
     * @param beaconAlias the beacon alias to be associated with this address
     */
    function _saveBeacon(address beacon, bytes32 beaconAlias) internal {
        aliases.add(beaconAlias);
        aliasToBeacon[beaconAlias] = beacon;
        beaconCount += 1;

        emit BeaconAdded(beaconAlias, beacon);
    }

    function _isFactoryBeaconOwner(address beacon) internal view returns (bool) {
        return UpgradeableBeacon(beacon).owner() == address(this);
    }
}

File 2 of 16 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 16 : Ownable2Step.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.0;

import "./Ownable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

    event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Returns the address of the pending owner.
     */
    function pendingOwner() public view virtual returns (address) {
        return _pendingOwner;
    }

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() external {
        address sender = _msgSender();
        require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
        _transferOwnership(sender);
    }
}

File 4 of 16 : draft-IERC1822.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

File 5 of 16 : IERC1967.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.3) (interfaces/IERC1967.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.9._
 */
interface IERC1967 {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}

File 6 of 16 : BeaconProxy.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/beacon/BeaconProxy.sol)

pragma solidity ^0.8.0;

import "./IBeacon.sol";
import "../Proxy.sol";
import "../ERC1967/ERC1967Upgrade.sol";

/**
 * @dev This contract implements a proxy that gets the implementation address for each call from an {UpgradeableBeacon}.
 *
 * The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't
 * conflict with the storage layout of the implementation behind the proxy.
 *
 * _Available since v3.4._
 */
contract BeaconProxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the proxy with `beacon`.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This
     * will typically be an encoded function call, and allows initializing the storage of the proxy like a Solidity
     * constructor.
     *
     * Requirements:
     *
     * - `beacon` must be a contract with the interface {IBeacon}.
     */
    constructor(address beacon, bytes memory data) payable {
        _upgradeBeaconToAndCall(beacon, data, false);
    }

    /**
     * @dev Returns the current beacon address.
     */
    function _beacon() internal view virtual returns (address) {
        return _getBeacon();
    }

    /**
     * @dev Returns the current implementation address of the associated beacon.
     */
    function _implementation() internal view virtual override returns (address) {
        return IBeacon(_getBeacon()).implementation();
    }

    /**
     * @dev Changes the proxy to use a new beacon. Deprecated: see {_upgradeBeaconToAndCall}.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon.
     *
     * Requirements:
     *
     * - `beacon` must be a contract.
     * - The implementation returned by `beacon` must be a contract.
     */
    function _setBeacon(address beacon, bytes memory data) internal virtual {
        _upgradeBeaconToAndCall(beacon, data, false);
    }
}

File 7 of 16 : IBeacon.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

File 8 of 16 : UpgradeableBeacon.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/UpgradeableBeacon.sol)

pragma solidity ^0.8.0;

import "./IBeacon.sol";
import "../../access/Ownable.sol";
import "../../utils/Address.sol";

/**
 * @dev This contract is used in conjunction with one or more instances of {BeaconProxy} to determine their
 * implementation contract, which is where they will delegate all function calls.
 *
 * An owner is able to change the implementation the beacon points to, thus upgrading the proxies that use this beacon.
 */
contract UpgradeableBeacon is IBeacon, Ownable {
    address private _implementation;

    /**
     * @dev Emitted when the implementation returned by the beacon is changed.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Sets the address of the initial implementation, and the deployer account as the owner who can upgrade the
     * beacon.
     */
    constructor(address implementation_) {
        _setImplementation(implementation_);
    }

    /**
     * @dev Returns the current implementation address.
     */
    function implementation() public view virtual override returns (address) {
        return _implementation;
    }

    /**
     * @dev Upgrades the beacon to a new implementation.
     *
     * Emits an {Upgraded} event.
     *
     * Requirements:
     *
     * - msg.sender must be the owner of the contract.
     * - `newImplementation` must be a contract.
     */
    function upgradeTo(address newImplementation) public virtual onlyOwner {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Sets the implementation contract address for this beacon
     *
     * Requirements:
     *
     * - `newImplementation` must be a contract.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "UpgradeableBeacon: implementation is not a contract");
        _implementation = newImplementation;
    }
}

File 9 of 16 : ERC1967Upgrade.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.3) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeacon.sol";
import "../../interfaces/IERC1967.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade is IERC1967 {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}

File 10 of 16 : Proxy.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

File 11 of 16 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

File 12 of 16 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 13 of 16 : StorageSlot.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
}

File 14 of 16 : EnumerableSet.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        bytes32[] memory store = _values(set._inner);
        bytes32[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

File 15 of 16 : IERC5313.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// taken from: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/interfaces/IERC5313.sol
// as of deployment, version 4.9 of OpenZeppelin/openzeppelin-contracts, that holds this interface, is not released. Will change it when it will be

/**
 * @dev Interface for the Light Contract Ownership Standard.
 *
 * A standardized minimal interface required to identify an account that controls a contract
 *
 * _Available since v4.9._
 */
interface IERC5313 {
    /**
     * @dev Gets the address of the owner.
     */
    function owner() external view returns (address);
}

File 16 of 16 : CollectionProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.8.15;

import {BeaconProxy} from "@openzeppelin/contracts-0.8.15/proxy/beacon/BeaconProxy.sol";

/**
 * @title CollectionProxy
 * @author qed.team x The Sandbox
 * @notice Beacon Proxy extension that supports having an admin (owner equivalent) that can
 *         change the beacon to which this proxy points to. Initial admin is set to the deployer
 *
 * @dev as there are several functions added directly in the proxy, any contract behind it (implementation)
 *      must be aware that functions with the following sighash will not be reached, as they will hit the
 *      proxy and not be delegate-called to the implementation
 *
 *      Sighash   |   Function Signature
 *      =========================================
 *      f8ab7198  =>  changeBeacon(address,bytes)
 *      aac96d4b  =>  changeCollectionProxyAdmin(address)
 *      59659e90  =>  beacon()
 *      3e47158c  =>  proxyAdmin()
 *
 */
contract CollectionProxy is BeaconProxy {
    /*//////////////////////////////////////////////////////////////
                            Initializers
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Collection constructor; pass-through while setting the admin to the sender
     *         see {BeaconProxy.constructor} for more details
     * @custom:event {ERC1967Upgrade.AdminChanged}
     */
    constructor(address beacon_, bytes memory data_) BeaconProxy(beacon_, data_) {
        _changeAdmin(msg.sender);
    }

    /*//////////////////////////////////////////////////////////////
                    External and public functions
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Changes the beacon to which this proxy points to
     * @dev any function from implementation address with a signature hash collision of f8ab7198 will reroute here and cannot be executed
     *      If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon.
     *      Sighash   |   Function Signature
     *      =========================================
     *      f8ab7198  =>  changeBeacon(address,bytes)
     *      custom:event {ERC1967Upgrade.BeaconUpgraded}
     * @param newBeacon the new beacon address for this proxy to point to
     * @param data initialization data as an encodedWithSignature output; if exists will be called on the new implementation
     */
    function changeBeacon(address newBeacon, bytes memory data) external {
        require(msg.sender == _getAdmin(), "CollectionProxy: only admin can change beacon");
        _setBeacon(newBeacon, data);
    }

    /**
     * @notice Changes the admin of the beacon to a new provided one
     * @dev any function from implementation address with a signature hash collision of aac96d4b will reroute here and cannot be executed
     *      Sighash   |   Function Signature
     *      ========================
     *      aac96d4b  =>  changeCollectionProxyAdmin(address)
     *      @custom:event {ERC1967Upgrade.AdminChanged}
     * @param newAdmin the new admin of the proxy
     */
    function changeCollectionProxyAdmin(address newAdmin) external {
        address admin = _getAdmin();
        require(msg.sender == admin, "CollectionProxy: only admin can change admin");
        _changeAdmin(newAdmin); // checks for "new admin is the zero address"
    }

    /**
     * @notice retrieves the currently pointed to beacon address
     * @dev any function from implementation address with a signature hash collision of 59659e90 will reroute here and cannot be executed
     *      Sighash   |   Function Signature
     *      ========================
     *      59659e90  =>  beacon()
     * @return the address of the currently pointed to beacon
     */
    function beacon() external view returns (address) {
        return _beacon();
    }

    /**
     * @notice gets the admin of the proxy
     * @dev any function from implementation address with a signature hash collision of 3e47158c will reroute here and cannot be executed
     *      Sighash   |   Function Signature
     *      ========================
     *      3e47158c  =>  proxyAdmin()
     * @return proxy admin address
     */
    function proxyAdmin() external view returns (address) {
        return _getAdmin();
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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":"index","type":"uint256"}],"name":"getCollection","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCollections","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"beaconAlias","type":"bytes32"},{"internalType":"address","name":"newBeaconOwner","type":"address"}],"name":"transferBeacon","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_collections","type":"address[]"},{"internalType":"address","name":"newCollectionOwner","type":"address"}],"name":"transferCollections","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"beaconAlias","type":"bytes32"},{"internalType":"address","name":"implementation","type":"address"}],"name":"updateBeaconImplementation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"bytes32","name":"beaconAlias","type":"bytes32"},{"internalType":"bytes","name":"updateArgs","type":"bytes"}],"name":"updateCollection","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.